Pigments of Fungi. LXIII. Synthesis of (1S,3R)- and (1R,3S)-Austrocortilutein and the Enantiomeric Purity of Austrocortilutein in some Australian Dermocybe Toadstools
作者:Catherine Elsworth、Melvyn Gill、Evelin Raudies、Abilio Ten
DOI:10.1071/ch99144
日期:——
The naturally occurring tetrahydroanthraquinones(1S,3R)- and(1R,3S)-austrocortilutein (1b) and(1d), respectively, are synthesized for the first time in enantiomericallypure form by Diels–Alder cycloaddition between the functionalizedbutadiene derivative (4) and the corresponding monochiraltrans-1,3-dihydroxy-1,2,3,4-tetrahydro-5,8-naphthoquinone (5a) or (5b), themselves derived from citramalicacid
天然存在的四氢蒽醌 (1S,3R)- 和 (1R,3S)-austrocortilutein (1b) 和 (1d) 首次通过功能化丁二烯衍生物 (4) 和相应的单手性反式-1,3-二羟基-1,2,3,4-四氢-5,8-萘醌 (5a) 或 (5b),它们本身衍生自柠苹果酸。通过在手性固定相上使用 h.plc 分离四种立体异构体 austrocortiluteins 揭示了 (1S,3S)-和 (1R,3R)-醌 (1a) 和 (1c) 的对映体纯度因物种而异,而 ( 1S,3R)-异构体 (1b) 在所检查的五种情况下是对映体纯的。